package com.net.spring_security;

import java.util.Collection;
import java.util.Iterator;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;

public class MyAccessDecisionManage implements AccessDecisionManager {

	public void decide(Authentication authentication, Object object,
			Collection<ConfigAttribute> configAttributes)
			throws AccessDeniedException, InsufficientAuthenticationException {
		if(configAttributes == null){
			return ;
		}
		//System.out.println(object.toString());  //object is a URL.
		Iterator<ConfigAttribute> ite=configAttributes.iterator();
		while(ite.hasNext()){
			ConfigAttribute ca=ite.next();
			String needRole=((SecurityConfig)ca).getAttribute();
			for(GrantedAuthority ga:authentication.getAuthorities()){
				if(needRole.equals(ga.getAuthority())){  //ga is user's role.
					return;
				}
			}
		}
		throw new AccessDeniedException("no right");
	}

	public boolean supports(ConfigAttribute attribute) {
		return true;
	}

	public boolean supports(Class<?> clazz) {
		return true;
	}

}
